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Sen. Al Franken wants Euclid to stop tracking shoppers in stores using wifi, Adweek says. Franken says shoppers in stores and malls do not expect to have their phones monitored, and shoppers are only given the option to opt-out if they know to go to the company's web site. He wrote to the the startup's CEO, Will Smith: "Recent news reports suggest that Euclid's technology has tracked 50 million unique smart phones or other WiFi enabled devices.... I find this troubling." Euclid tells us: "Euclid does provide in-store notice when a retailer is using its service to inform customers the technology is in use and how to opt-out. Euclid has great respect for Senator Franken’s role as a leading voice on this issue, and is working to answer his questions as quickly as possible." Read the full statement here.

Facebook is considering using hashtags in order to take advantage of real-time marketing dollars it may currently be missing out on.